From: Jean Delvare Date: Sun, 25 Sep 2005 14:50:06 +0000 (+0200) Subject: [PATCH] i2c: Adjust i2c_probe() for busses without SMBUS_QUICK X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4366dc946c01305cff49b07dabb806d2364f1edb;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git [PATCH] i2c: Adjust i2c_probe() for busses without SMBUS_QUICK Move the check for SMBUS_QUICK in i2c_probe() after the forced addresses have been handled. This makes it possible for a driver to leave the probed address lists empty, only providing forced addresses, and get i2c_probe to work even if the bus doesn't support SMBUS_QUICK. Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman drivers/i2c/i2c-core.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) --- diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 45aa0e54e29..b55097d57b7 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -706,10 +706,6 @@ int i2c_probe(struct i2c_adapter *adapter, int i, err; int adap_id = i2c_adapter_id(adapter); - /* Forget it if we can't probe using SMBUS_QUICK */ - if (! i2c_check_functionality(adapter,I2C_FUNC_SMBUS_QUICK)) - return -1; - /* Force entries are done first, and are not affected by ignore entries */ if (address_data->forces) { @@ -736,6 +732,17 @@ int i2c_probe(struct i2c_adapter *adapter, } } + /* Stop here if we can't use SMBUS_QUICK */ + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_QUICK)) { + if (address_data->probe[0] == I2C_CLIENT_END + && address_data->normal_i2c[0] == I2C_CLIENT_END) + return 0; + + dev_warn(&adapter->dev, "SMBus Quick command not supported, " + "can't probe for chips\n"); + return -1; + } + /* Probe entries are done second, and are not affected by ignore entries either */ for (i = 0; address_data->probe[i] != I2C_CLIENT_END; i += 2) {